Extension device



April 29, 1930- S. J. BERTHERMAN 1,756,333

EXTENSION DEVICE Filed Dec, 7, 1929 A TTORNEYS.

Patented -Apin 229i, 1930 UNITED sArEs SIDNEY J. BERTHERMAN, OF CHEIEAClf-IIET,l RHODE ISLAND, V.ASSIGrNORUJO L. & B.

JEWELRY MANUFACTURING COMPANY, OF

PORATION OF RHODE ISLAND EXcinNsatoN`A `ianvron l Application iea December 7, laas. seria; nog. 413,465.

My present invention relates to extension devices for flexible bracelets,and has particular reference to novel structure for retaining the extension devices in folded posi- One object of my invention is to provide a lock mechanism whichr stands up under long continued usage. f y

Another object of my invention is to simplifyfthe construction andthe assembly of the lock mechanism.

A further object is to provide acatch member of a springy resilient material, different from the material used for the extension sections.

An additional object struck up from one extension section to vsecure the catch .member thereto.`

With these and other objects and advantageous features in view,.the invention consists lof novel arrangements of parts more fully disclosed in the vdetailedV description following, in conjunctionwitli the accompanying drawings, and more particularly set forth in the appended claims. Y

In the drawings:

Fig. 1 is a top plan view ofthe extension device in folded position ;Y

' Fig. 2 is a view similar to Figure 1, showing the extension device in unfolded position' Y Fig. 3 is a side vievsi7 corresponding to Figure 2;

Fig. 4 is a section on the line 4-4 of Figure 3;v Y

Fig. 5 is a longitudinal section of the eX- tension device in folded position; and

Fig. 6 is a transverse section on the line 6-6 of Figure 5. f

It hasbeen found desirable, in constructing extension devices, to provide a catch member of different material rthan the material used for theV extension sections, thus per- I mitting use of a soft material such as silver for the sections, and a hard, springy steel for Y the catch member. I have utilized a U-sliaped catch member of this type, andhave struck ,up ears from the stock of one extension section to fold overthe base of the catch member to rigidly secure the catch member to its secyis to utilize ears.

rnovrnnivonnnonn rsnnnngn oort-Y tion; and the following is a detailed descripf tion lof a .preferred construction embodying the principles of my invention. f

Referring to the drawings,l0 designates the entension device asa whole, the extension device including a channel shaped cover section 11, an intermediate section 12 hinged there-V to, and an end section 13 hinged to the intermediate section and adapted tofold with the intermediate section into the cover section between the side walls 14, 15 thereof. The strap ends 16, 17 are respectively secured to the y sections 11, 13 by an adjustable clamp 18 and a pivot connection 19. V

The intermediate section 12 has a latch openingr20 centrally positioned adjacent itsY folded together.; the ends vof the sides 23, 24

are rounded as shown in Figure 6.

The catch 21 is preferably formed of hard,

1 springy'steel, and is rigidly secured to the end section by two rears 25, 26 struck up from the material of theend section and Vfolded over the base 22 of the catch in abutting relation toloolr the catch in position.

My improved construction therefore simpliii'es the assembly of the catch, since no riveting is required, and permits the use of a catch formed of hard, resilient material, in an extension device formed of the softer and more ductile decorative materials used in the jewelry art.

`While Il have described a specific embodi- 'n ment illustrating my invention, it is obvious that desired changes in structure andin arrangement may be made, without departing from-the spirit and the scope vof the invention as defined in the appended claims.

I claim:

1. In an extension device for flexible bracelets, a plurality of sections hingedly connected to fold together, means for securing bracelet ends to the'free ends of theend sections, a latch opening in one section, a cooperating resilientYU-shaped catch on one of the ,end sections, and a memberstruck from the stock of the said en d section and folded over the base of said catch to lock said catch to the said end section.

2. In an extension device for flexible bracelets, a plurality yof sections hingedly oonnected -to fold together, means for securing hraceletends'to the'free' ends of'the end seotions, a latch opening in one seoti0n, a Cooperating resilientfU-shaped catch on one of the end sections,A andv aligned ears struck from the stock of the said end section and folded over the base of said catch to look said catch to the said end section.

In testimony whereof l aHiX my signature.

SIDNEY J BERTHERMAN. 

